When to plant dill in Zone 4a
Your dill timeline — Zone 4a
| Direct-sow | April 27 – May 11 |
|---|---|
| Zone 4a last frost | ~05/14 |
| Zone 4a first frost | ~09/27 |
Dates computed from Zone 4a's median NOAA frost normals and the cited rule. Your town may differ by a week or two — check your exact ZIP.
What you'll need
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Calendar computed 2026-09-28. Frost: NOAA NCEI 1991–2020. Zone: USDA 2023. Rule: University of Illinois Extension — Herb Gardening: Dill.